<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "yyste");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
$wechatObj->responseMsg();

class wechatCallbackapiTest
{
	public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
        	echo $echoStr;
        	exit;
        }
    }

    public function responseMsg()
    {
	//get post data, May be due to the different environments
	$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

	
	$fp = fopen( "./log/log.txt", "w" );
	$tmpContent = "Content: ".$postStr;
	fwrite( $fp, $postStr );
	fclose( $fp );

      	//extract post data
	if (!empty($postStr)){
                
              	$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "<xml>
				<ToUserName><![CDATA[%s]]></ToUserName>
				<FromUserName><![CDATA[%s]]></FromUserName>
				<CreateTime>%s</CreateTime>
				<MsgType><![CDATA[%s]]></MsgType>
				<Content><![CDATA[%s]]></Content>
				<FuncFlag>0</FuncFlag>
			</xml>";
		if(!empty( $keyword ) && $keyword == "Hello2BizUser" )
                {
              		$msgType = "text";
                	$contentStr = "欢迎关注人人P2P，我们将定期为您推送最新的海外影视剧！手机端也可以访问http://www.yyste.com获得最新的影视信息~";
                	$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                	echo $resultStr;
                }else{
                	echo "Input something...";
                }


        }else {
        	echo "post is empty";
        	exit;
        }
    }
		
	private function checkSignature()
	{
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];	
        		
		$token = TOKEN;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );
		
		if( $tmpStr == $signature ){
			return true;
		}else{
			return false;
		}
	}
}

?>
